160 SPECIFIC 



Fig. 5. B. patulum. 



Shell muricate; outer lip crenate; columella 

 flattened rather concave, sickle-shaped. 



Lister Conch, tab. 989. %. 49. 



Specimen white^ with dark brown transverse 

 striae, lines, and tubercles; the brown striiae more 

 or less confluent in parts, so as to form longitudinal 

 dark rays and transverse belts; within blueish, and 

 showing the external white belts through the sub- 

 stance of the shell; columellar lip bright orange. 



Inhabits Africa and America. 



Fig. 6. B. spiratum. 



Shell smooth ; whorls separated by a broad ca- 

 nal; columella abrupt, perforated. 



Lister Conch, tab. 981. fig. 41. 



Specimen white, with ochraceous spots ; aper- 

 ture ovate, emarginate at the top; umbilicus usu- 

 ally very broad and deeply perforated, but in this 

 variety nearly closed, leaving but a very small hole 

 visible ; columellar lip white and polished. 



Inhabits India and China. 



Fig. 7. B. reticulatum. 



